US2887352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: General Fireproofing Co
•
Filing: 1958-02-20
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Granted: 1959-05-19
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Expires: 1978-02-20
Abstract
No abstract record available.
Inventors
- 👤 Allison R Ruddell
- 👤 Rudolph H Wilmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:30
CPC Classifications
B; B42; B42F; B42F17/00; B42F17/02; B42F17/08; B42F17/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US476150A
Cited
US2109689A
Cited
US2386343A
Cited
US2499126A
Cited
US2574523A
Cited
US2482174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |